import Vue from 'vue'
import VueI18n from 'vue-i18n'
import Cookies from 'js-cookie'
import elementEnLocale from 'element-ui/lib/locale/lang/en' // element-ui lang
import elementZhLocale from 'element-ui/lib/locale/lang/zh-CN' // element-ui lang
import enLocale from './en'
import zhLocale from './zh'
import enEmLocale from '../../src/locale/lang/en'
import zhEmLocale from '../../src/locale/lang/zh'

Vue.use(VueI18n)

const messages = {
	en: {
		...enLocale,
		...elementEnLocale,
		...enEmLocale
	},
	zh: {
		...zhLocale,
		...elementZhLocale,
		...zhEmLocale
	}
}

export function getLanguage() {
	const chooseLanguage = Cookies.get('language')
	if (chooseLanguage) {
		return chooseLanguage
	}

	// if has not choose language
	const language = (navigator.language || navigator.browserLanguage).toLowerCase()
	const locales = Object.keys(messages)
	for (const locale of locales) {
		if (language.indexOf(locale) > -1) {
			return locale
		}
	}
	return 'en'
}

const i18n = new VueI18n({
	// set locale
	// options: en | zh | es
	locale: getLanguage(), // set locale messages
	messages,
	silentTranslationWarn: true
})

export default i18n
